indexo.dev

offbynone.io

.io crawl

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 156 ms crawled 2026-05-19

US · 13.33.235.98 · AS16509 Amazon.com, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Off-by-none: A Weekly Serverless Newsletter by Jeremy Daly
Description
Stay up to date on using serverless to build modern applications in the cloud. Get insights from experts, product releases, industry happenings, tutorials and much more, every week!
Language
en
Canonical
https://offbynone.io
Feeds

Open Graph

url
https://offbynone.io/
title
Off-by-none
description
Stay up to date on using serverless to build modern applications in the cloud. Get insights from experts, product releases, industry happenings, tutorials and much more, every week!

Technology

CDN
Amazon CloudFront
Server
AmazonS3
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts

Third-party hosts loaded (4)

  • cdn.jsdelivr.net×1
  • fonts.googleapis.com×1
  • www.google.com×1
  • www.googletagmanager.com×1

Social

Contact

Email

DNS records live

NS
  • ns-1194.awsdns-21.org
  • ns-1826.awsdns-36.co.uk
  • ns-404.awsdns-50.com
  • ns-781.awsdns-33.net
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
Verified for
  • Google

Email authentication weak

SPF
not published
DMARC
not published
DKIM
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsi70lwInqg1oZXm1bf2yz+1yzaDLuwChwkL0Vs3bXkPyPDPmbwM3ZqhVF2wrv3B8Z1HLjfahNSazhATeY/…
  • s2: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtoxyWZONEpePABNVH4TFGHRiV2YP3CRO+PF7afxUiRhh6yAyvymm8qgDgeVhjp7ksZCMVxiZ3Ist1l2Tz/…
selectors probed

Certificate (current)

Amazon RSA 2048 M04
from 2026-02-21 to 2026-09-07
Expires in 109 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://offbynone.io/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (4)

Linked from (2)